21106917

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13877}}^1$

素因数の和:13909

約数の個数: 18

約数和(自身を含む): 33015762

約数和(自身を除く): 11908845

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13877, 41631, 124893, 180401, 541203, 1623609, 2345213, 7035639, 21106917]

約数ペア:

[(1, 21106917), (3, 7035639), (9, 2345213), (13, 1623609), (39, 541203), (117, 180401), (169, 124893), (507, 41631), (1521, 13877)]